class

Tui::Buffer

Inherits Reference / Object

Constructors

new(width : Int32, height : Int32)

Instance methods

clear(cell : Cell = Cell.empty) : Nil

Clear buffer with optional cell

debug_dump

Debug dump: show non-space characters with positions

draw_box(x : Int32, y : Int32, w : Int32, h : Int32, style : Style = Style.default, border_style : BorderStyle = BorderStyle::Light) : Nil

Draw a box using BorderStyle enum

draw_box(x : Int32, y : Int32, w : Int32, h : Int32, style : Style, border_style : Symbol) : Nil

Legacy overload accepting Symbol for backwards compatibility

draw_hline(x : Int32, y : Int32, length : Int32, char : Char = '─', style : Style = Style.default) : Nil

Draw a horizontal line

draw_string(x : Int32, y : Int32, text : String, style : Style = Style.default) : Int32

Draw a string at position (with Unicode width support)

draw_vline(x : Int32, y : Int32, length : Int32, char : Char = '│', style : Style = Style.default) : Nil

Draw a vertical line

fill(x : Int32, y : Int32, w : Int32, h : Int32, cell : Cell = Cell.empty) : Nil

Fill a rectangle

flush(io : IO) : Nil

Flush changes to IO (typically STDOUT)

get(x : Int32, y : Int32) : Cell

Get a cell at position

height

in_bounds?(x : Int32, y : Int32) : Bool

Check if position is within bounds

invalidate

Force full redraw on next flush

invalidate_region(x : Int32, y : Int32, width : Int32, height : Int32) : Nil

Force redraw of a specific region

resize(new_width : Int32, new_height : Int32) : Nil

Resize buffer

save_ansi(path : String) : Nil

Save buffer as ANSI-colored text file

set(x : Int32, y : Int32, cell : Cell) : Nil

Set a cell at position

set(x : Int32, y : Int32, char : Char, style : Style = Style.default) : Int32

Set a cell with char and style (auto-detects wide characters) Returns the display width of the character (1 or 2)

set(x : Int32, y : Int32, text : String, style : Style = Style.default) : Int32

Set a cell with grapheme and style (auto-detects wide graphemes) Returns the display width of the grapheme (1 or 2)

set_wide(x : Int32, y : Int32, char : Char, style : Style = Style.default) : Int32

Set a wide character (handles 2-cell characters like emoji/CJK) Note: set(x, y, char, style) now auto-detects wide chars, so this is mainly for explicit use or backwards compatibility

set_wide(x : Int32, y : Int32, text : String, style : Style = Style.default) : Int32

to_ansi

Get buffer content with ANSI color codes (for visual debugging)

to_grid

Get buffer as simple grid for analysis (returns array of rows) Continuation cells (second half of wide chars) are skipped to match terminal display

to_s(io : IO) : Nil

Get buffer content as string (for testing)

width